Steam boiler



Feb. 7,, 1950 co 2,496,985

STEAM BOILER Filed 001;. 27, 1947 2 Sheets-Sheet l Feb, 2 950 E. R. COLE 2,496,985

STEAM BOILER Filed 001;. 27, 1947 2 Sheets-Sheet 2 IN VEN TOR. f/WWZTT R. 6'04 5 ATTEI RN EYE Patented Feb. 7, 195% UNITED STATES PATENT OFFICE-1.

STEAM BOILER Emmett R. Cole, Peru, Ind.

Application October 27, 1947, Serial No. 782,404

2 Claims.

My present invention relates generally to liquid heaters and Vaporizers, and more specifically to an improved water tube boiler of the upright or vertical type, and employing external water tubes surrounding a shell or drum.

The primary object of the invention is to increase the efiiciency of this type of boiler by providing an increased heating area or surface for the boiler, and thereby enhancing the conversion of Water to steam.

In carrying out my improvements I utilize a cylindrical shell or drum forming an upper steam dome, and having water intakes and steam outlet, which is equipped with an annular exterior vaporizing jacket including multiple nested and spaced water tubes open at their opposite ends to the water supply and the steam dome of the boiler shell. And the invention consists in certain novel features of construction and combinations and arrangements of parts as will hereinafter be described and more particularly set forth in the appended claims.

The invention involves a number of parts that may be manufactured with facility and low cost of production, and the parts may be assembled with convenience, to constitute a boiler or this type that is durable and efficient, and which may be maintained and serviced with a minimum expenditure of time and labor.

In the accompanying drawings I have illustrated a complete example of a physical embodiment of my invention in which the parts are combined and arranged in accord with one mode I have devised for the practical application of the principles of the invention. It will however be understood that changes and alterations are contemplated and may be made in these exemplifying drawings, within the scope of my claims, without departing from the principles of the invention.

Figure 1 is a top plan view of so much of a boiler as is necessary to illustrate my invention;

and

Figure 2 is a vertical central sectional view at line 2-2 of Fig. 1.

Figure 3 is a top plan view showing one of the multiple water tubes of the annular vaporizing jacket; and Figure 4 is a view in side elevation of one of the vaporizing units made up of the multiple water tubes or loops.

In order that the relation of parts and their utility may readily be understood I have indicated a steam boiler including the upright drum or cylindrical shell I having four radial or diametrically arranged water inlet or feed pipes as 2 located near the lower end of the shell, and a single steam tube 3 of larger diameter communicating through the upper head 4 with the interior steam dome of the drum or shell; and a conventional vertically arranged flue '5 extending through the drum opens through the upper head 6 and the lower plate 6 of the drum or shell. Additional water feed pipes 2' are arranged near the top of shell I.

An exterior annular water circulating and vaporizing jacket, which is mounted upon and surrounds the drum below its upper portion forming the interior steam dome, is made up of multiple units, and each of these units includes multiple water tubes, here shown as three in number although the number may be varied, and the tubes are designed to provide a tortuous flue exterior of the drum for gases of combustion or fuel'arising from the furnace.

Each vaporizing unit of the jacket includes a lower water fitting or tubular spur I having a closed outer end and a reduced open inner end 8 that is affixed by brazing, or in other suitable manner within an open water port 9 of the drum or shell. The tubular spur or fitting projects horizontally and laterally from the exterior of the shell an ample length to accommodate a group of three laterally spaced water tubes Il H, and 42, that are curved or bent to conform to the exterior cylindrical periphery of the shell, with their lower ends fixed at l3 to the tubular spur or fitting 1, and their upper ends fixed at M to a complementary steam fitting or tubular spur l5 that opens into the steam dome of the drum or shell, and is mounted in a port of the shell.

The water fitting and the steam fitting of each unit are mounted in the same vertical plane, and the water tubes are fashioned in the form of a V-shaped loop disposed with its apex pointing in a horizontal plane and fashioned with flaring ends curved toward the tubular fittings.

By this arrangement of an upper annular series of circumferentially spaced tubular spurs and a similar series of lower tubular spurs, together with the V-shape of the multi-tubes, the units are nested about the exterior of the shell to form a jacket, and the interstices between the parallel tubes provide a tortuous flue from the fire for hot gases that contact the multiple heating surfaces for quickly vaporizing the water and conversion into steam that is collected in the dome of the shell.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a. water tube steam boiler, the combination with a shell forming an upper interior steam dome and having a water inlet and steam outlet, of a vaporizing jacket surrounding the shell, said jacket consisting of multiple nested units of V- shaped formation with the apices pointing in a horizontal plane, and said units having their opposite ends in communication with the steam dome and the water space of the shell respectively.

2. In a water tube steam boiler, the combination with a cylindrical shell forming an upper steam dome and having a water inlet and a steam outlet, of an upper exterior circumferentially spaced series of tubular steam spurs and a lower exterior circumferentially spaced series of tubular water spurs mounted in the shell, and multiple units of spaced V-shaped vaporizing tubes ar- REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 250,390 Ramsbottom Dec. 6, 1881 797,329 Scherrer Aug. 15, 1905 

